Security Forces Remove Protesters at Pope Francis' Havana Mass

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Two unidentified men are taken away by security officers after they threw leaflets as Pope Francis arrives for a Mass at Revolution Plaza in Havana, Cuba, Sunday Sept. 20, 2015. Francis will not be meeting with dissidents during his visit, sparking critiques from the political opposition who say they feel let down by an institution they believe should help push for greater freedom in Cuba.

Cuban security personnel Sunday detained at least three people who appeared to be trying to distribute leaflets ahead of Pope Francis's Mass in Havana's Revolution Square.

The officials dragged them away and picked up the flyers that were left on one of the streets surrounding the plaza. It's not clear what the protest was about. The three were in white T-shirts and were yelling before they were tackled and dragged away.

Pope Francis is in Cuba at the start of a 10-day trip to the island nation and its onetime Cold War adversary, the United States. He arrives in Washington, D.C. on Tuesday.

Earlier Sunday, Francis circled the crowd gathered for the Mass, stopping his open-sided popemobile frequently to greet worshippers and kiss youngsters handed up to him.